<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div class="box">
        <div class="item">10</div>
        div
    </div>
</body>
<style>
    body {
        margin: 0;
        padding: 0;
    }

    .box {
        position: relative;
        width: 200px;
        height: 100px;
        background-color: skyblue;
        transform: perspective(200px) rotateY(60deg);
        perspective: 200px;
        
    }

    .item{
        top:0;
        left:0;
        position: absolute;
        width: 100%;
        height: 100%;
        background-color: pink;
        transform: rotateY(60deg);
    }
</style>

</html>